首页|High-entropy oxide-supported platinum nanoparticles for efficient hydrogen evolution reaction
High-entropy oxide-supported platinum nanoparticles for efficient hydrogen evolution reaction
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High-entropy oxides(HEOs)are a new class of single-phase structures with unique electronic and catalytic properties;therefore,it is worthwhile to explore their applications in electrocatalysis.In this study,a Pt/(FeCo-NiCrAl)3O4 nanohybrid using HEO as a support was developed as an efficient catalyst for the hydrogen evolu-tion reaction(HER).Pt/(FeCoNiCrAl)3O4 exhibited high HER activity with a low overpotential of 22 mV at 10 mA·cm-2,outperforming other binary,ternary,and quaternary supports.The HER activity of Pt/(FeCoNi-CrAl)3O4 was higher than that of a commercial Pt/C with a significantly lower Pt loading.The catalyst exhibited good activity and long-term stability(60 h)in an electrolytic water-splitting device.This good activity can be attributed to the fact that the introduction of Pt effectively facilitates electronic interactions between Pt and the HEO.In addi-tion,the HEO substrate was more favorable for dispersing Pt particles,optimizing the electrochemical specific surface area,and significantly reducing the charge resistance of the HER.This study extends the application of HEOs in electrocatalysis and demonstrates the promising prospects of HEOs as supports for electrocatalysts.
Ming-Yu Fan、Jia-Jun Wang、Jun Zhao、Hong Zhang、Tian-Yi Ma、Xiao-Peng Han、Wen-Bin Hu
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School of Materials Science and Engineering,Tianjin Key Laboratory of Composite and Functional Materials Key Laboratory of Advanced Ceramics and Machining Technology, Tianjin University,Tianjin 300350,China
Joint School of National University of Singapore and Tianjin University,International Campus of Tianjin University,Fuzhou 350207,China
School of Science,RMIT University,Melbourne,VIC 3000,Australia
National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of China
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